Liu Jianli, Qi Xiangdong, Zhang Shanwen, Sun Ci, Zhu Jiwei, Cui Jicheng, Li Xiaotian
Appl Opt. 2018 Nov 20;57(33):9735-9745. doi: 10.1364/AO.57.009735.
Spatial heterodyne Raman spectrometry (SHRS) is a spectral analysis technique used to study material structures and compositions. We propose a multi-grating SHRS system that uses a multi-grating module rather than the single grating used to terminate each arm in traditional spatial heterodyne spectrometry (SHS). The proposed system not only retains the advantages of traditional SHS but also resolves the mutual limitation between system spectral range and resolution. The increased spectral range and resolution that can be achieved in detection are dependent on the number of sub-gratings used in the module. A verification system was built using 130 gr/mm and 150 gr/mm sub-gratings and calibrated. Under different experimental conditions (including laser power, integration time, container material and thickness, pure and mixed samples, and standoff experiments), the backscattered Raman spectra of different types of targets (including organic solutions, inorganic powders, and minerals) were tested. The multi-grating SHRS shows good performance for broad spectral range and high-resolution Raman detection.
空间外差拉曼光谱法（SHRS）是一种用于研究材料结构和成分的光谱分析技术。我们提出了一种多光栅SHRS系统，该系统使用多光栅模块，而不是传统空间外差光谱法（SHS）中用于终止每个臂的单个光栅。所提出的系统不仅保留了传统SHS的优点，还解决了系统光谱范围和分辨率之间的相互限制。检测中可实现的光谱范围和分辨率的增加取决于模块中使用的子光栅数量。使用130线/毫米和150线/毫米的子光栅构建了一个验证系统并进行了校准。在不同的实验条件下（包括激光功率、积分时间、容器材料和厚度、纯样品和混合样品以及远距离实验），测试了不同类型目标（包括有机溶液、无机粉末和矿物）的背散射拉曼光谱。多光栅SHRS在宽光谱范围和高分辨率拉曼检测方面表现出良好的性能。
